Because there are serious costs to bringing everything in-house; you've got to get hold of the capital, you lose any economies of scale that come from addressin

Because there are serious costs to bringing everything in-house; you've got to get hold of the capital, you lose any economies of scale that come from addressing a larger market, etc. With regards to transportation costs, you're assuming that a restaurant running a private vertical farm could do so on its storefront premises, which is a big assumption. Most pricey restaurants are space-limited.